All the logical work (if not all the rhetorical work) in “Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety” is being done by the decision about what aspects of liberty are essential, and how much safety is at stake. The slogan might work as a reminder not to make foolish tradeoffs, but the real difficulty is in deciding which tradeoffs are wise and which are foolish. Once we figure that out, we don’t need the slogan to remind us; before we figure it out, the slogan doesn’t really help us.

--Eugene Volokh, "Liberty, safety, and Benjamin Franklin"

A good example of the risk of reading too much into slogans that are basically just applause lights. Also reminds me of "The Choice between Good and Bad is not a matter of saying 'Good!' It is about deciding which is which."